w0 = ("happy")
print(w0, type(w0))  # 结果：happy <class 'str'>

w1 = ("happy",)  # 注意逗号，如果元组中只有一个元素，逗号不能省
print(w1, type(w1))  # 结果：('happy',) <class 'tuple'>

w2 = tuple("everyday")
print(w2, type(w2))  # 结果：('e', 'v', 'e', 'r', 'y', 'd', 'a', 'y') <class 'tuple'>

w3 = tuple([2, 3, 4, 5])
print(w3, type(w3))  # 结果：(2, 3, 4, 5) <class 'tuple'>
